Building plate



Aug- 2 9 4- A. SCHUMANN BUILDING PLATE Filed Jan. 31, 1940 In ven for 06va Z Allorney Patented Aug. 22, 1944 1 BUILDING PLATE Artur Schumann,Kustrin-Neustadt, Germany; vested in the Alien Property CustodianApplication January 31, 1940, Serial No. 316,636 In Germany January 18,1938 7 Claims.

Plates for building purposes are known which consist of an armouring andof a filling substance, the armouring being encased inside the fillingsubstance. The known plates are not always advantageous because, owingto the position of the armouring in the neutral fibre of the crosssection, the resistance against bending is not high enough. If thearmouring consists of iron, for example iron wires or wire netting, theplate cannot be cut and planed, and it can be nailed only to a limitedextent and is also expensive.

These disadvantages are obviated by increasing the bending strength inarranging thin plates of veneer wood on both sides of the fillingsubstance, which consists of saw dust with a binding medium, for examplegypsum, and in attaching, for example, gluing, waste wood strips,preferably waste veneer wood strips, to the mentioned plates of veneerwood, in this way forming the armouring. The waste wood strips arearranged so as to cross the fibres of the veneer plates. The preparationof the plate according to the invention is comparatively simple. As onlywaste wood strips of a low value are used, for example waste edges,veneer wastes or the like, which are obtained in squaring timber, thecost of making the plate is comparatively low. Of course, veneers may beused instead of the waste wood strips, in which case, however, the costof making the plate according to the invention will not be low as whenusing ordinary waste strips.

The subject of the invention is illustrated by way of example in theaccompanying drawing in which:

Fig, 1 is a plan view of a plate according to the invention, and

Fig. 2 is a cross section of the plate on the line IIII of Fig. 1.

Fig. 3 is a cross-sectional view of a modified form.

In the drawing, a, and b indicate thin wood each of the veneer plates aand b is highly strengthened by the waste wood strips glued on.According to the invention, two veneer plates with glued on waste woodstrips are combined to form a building plate by means of a fillingsubstance consisting principally of saw dust. As binding for examplecement, gypsum, bitumen, asphalt,

artificial resin, albumen, casein, waterglass, dex trine, light cementsand the like are used. A building plate made in this way may be readilysawed, planed, nailed or worked in any other way.

The arrangement of the waste wood strips is made, as will be seen fromthe drawing, so that the waste wood strips of the plate a alternate withthe waste wood strips of the'plate b, leaving corresponding spaces,

The building plate according to the invention is made in the followingway:

First in the veneer plate b, for example, is placed with the wasteveneer strips e at the top on a support, and then the filling substance0, mixed with the binding medium, is applied in a thick layer of, forexample, 1 to 2 cm. height. Then, the veneer plate a is placed with thewaste veneer strips (1, which are glued on to the plate, upon thefilling substance, and the whole is pressed together. An importantadvantage in using waste strips consists in the fact that these have atleast one rough or uneven edge, as indicated at e1, whereby aparticularly tight and fast,

anchoring of these waste strips in the filling substance is obtained.

Instead of single veneer plates a and b, it is, of course, possible touse several vener plates glued together, so-called plywood plates,which, however, raises the cost of making the building plate.

If, for special purposes, the tensile strength of the building plate inthe direction of the fibres g of the veneer plates :1 and b should notbe sufficient, there may be arranged waste veneer strips in the middleof the plate in the direction of the fibres g, as indicated at h.

The building plate according to the invention is suitable for manypurposes, such as walls, wall panels, ceilings, furniture parts and thelike, and,

besides its cheapncss, it has the advantage of being very strong andhighly resistant to weather influences. It does not become distorted andmay be easily polished.

What I claim is:

1. A building plate capable of being cut, planed and nailed consistingof two spaced thin veneer plates, thin veneer waste strips arranged onthe proximate faces of each of said plates at a distance not greaterthan about the double walls along elongated areas staggered one with theother.

2. A building plate capable of being cut, planed and nailed consistingof two spaced thin veneer plates, thin veneer waste strips, arranged onthe proximate faces of each of said plates at a distance not greaterthan about the double width of the waste veneer strips from each otherand glued to the veneer plates across the direction of the fibers of thelatter alternately with one and with the other veneer plate to formopposed interrupted surfaces, and a compressed conformable bindingmedium mixed with cement, the essential ingredient thereof being sawdustfor uniting said opposed interrupted surfaces to form a panel, saidwaste strips serving to reinforce the opposite panel walls alongelongated areas staggered one with the other.

3. A building plate capable of being cut, planed and nailed consistingof two spaced thin veneer plates, thin veneer waste strips, arranged onthe proximate faces of each of said plates at a distance not greaterthan about the double width of the veneer waste strips from each otherand glued to the veneer plates across the direction of the fibers of thelatter alternately with one and with the other veneer plate to formopposed interrupted surfaces, individual veneer waste strips positionedsubstantially midway between said interrupted surfaces, said individualstrips extending parallel to the direction of the fibers of the veneerplates and a compressed conformable filling substance mixed with abinding medium for binding the interrupted surfaces of said veneerplates in spaced relation to the opposite faces of said individualstrips to form a panel, said waste strips serving to reinforce theopposite panel walls along elongated areas staggered one with the other.

,4. A building panel capable of being cut, planed and nailed comprisingtwo spaced veneer plates, a plurality of separate veneer strips securedto the proximate faces of each of said plates, the longitudinal axes ofsaid strips extending trans versely of the fibers of said plates toreinforce the plates and to provide interrupted surfaces on theproximate faces thereof, and a mouldable and hardenable substanceconforming to the space between said proximate interrupted surfaces forbinding said spaced veneer plates and associated strips together to forma panel.

5. A building panel comprising a pair of spaced veneer plates, aplurality of flat strips glued to the proximate faces of said plates toprovide opposed interrupted surfaces, and a mouldable and hardenablesubstance conforming to the space between said opposed interruptedsurfaces for binding said spaced veneer plates and associated stripstogether to form a panel.

6. A building panel comprising a pair of substantially parallel thinveneer plates spaced apart from each other, a plurality of parallelwaste strips alternately spaced on the proximate faces of said veneerplates, to thereby provide opposed interrupted surfaces, thelongitudinal axes of said strips extending transversely of the fibers insaid plates, and a plastic binding substance composed of sawdust andgypsum conforming to the space between said opposed interrupted surfacesfor binding said spaced veneer plates and associated strips together toform a panel, said Waste strips serving to alternately reinforce theouter walls of said panel along parallel elongated areas.

7. A building plate according to claim 6 in which a plurality of secondveneer strips are arranged within said plastic binding substancetransversely of and substantially midway between said opposedinterrupted surfaces, whereby said waste strips Will cooperate with saidsecond strips to provide reinforcement in both directions.

ARTUR SCHUMANN.

